Interesting timing chain pulley

[gzig5]

I’ve got this new Cloyes timing chain that I just sent to my engine builder. I bought it a couple years ago and put it on the shelf when it came in and I never even looked at it carefully until I got it ready to ship to him. That’s when I noticed that the big pulley has holes on half of it but not the other half. Seems like it would be out of balance. Has anyone else seen something like this? It looks like it was meant to be that way, and not a mistake.

 

[toolmanmike]

A pulley drives a belt. A sprocket drives a chain.

 

[413]

It spins half crank RPM and not a lot of mass or diameter.

I've seen those, must have some reasoning?

 

[MV8]

There should be a thick ring outboard of the holes on the other side, so it is still balanced. Probably how they differentiate their best timing sets.

 

[4spdragtop]

I bet they're access holes for "something"??

 

[Mopar Sam]

Its to offset the weight of the fuel pump eccentric.

 

[Scody21]

Cloyes is hot garbage, that chain will be stretched like a broken rubber band within 20 hours of running…. When your motor starts running like crap, you'll check the timing and see it jump around 10 degrees you’ll know why… Cloyes hot garbage…….

 

[413]

Cloyes is hot garbage, that chain will be stretched like a broken rubber band within 20 hours of running…. When your motor starts running like crap, you'll check the timing and see it jump around 10 degrees you’ll know why… Cloyes hot garbage…….

What is a good timing set?

 

[4spdragtop]

Product Information - Nornda.
Rollmaster/Romac also. I put the JP/Nornda one in our 340. No issues

What is a good timing set?

 

[gzig5]

A pulley drives a belt. A sprocket drives a chain.

Yeah, yeah. Potato, patatoe.

 

[gzig5]

Its to offset the weight of the fuel pump eccentric.

I thought that might be it, but then the stock ones and 90% of aftermarket ones have a concentrically weighted "sprocket". You'd think if it was important, everyone would be doing it.

 

[Scody21]

Pro gear and the 80 dollar Summit brand set.

 

[MV8]

It isn't better or worse; just obviously different to support $150 for a timing set. Can't have it looking like a $30 timing set, right? The differences are in the quality of the chain and hardening, plus the multi key crank is a good indicator. You can look one up on summit to see the description. The cheap Cloyes would be just that.

 

[RustyRatRod]

I thought that might be it, but then the stock ones and 90% of aftermarket ones have a concentrically weighted "sprocket". You'd think if it was important, everyone would be doing it.

One drives a belt one drives a chain. Mike is just trying to make sure the guy doesn't end up sounding like an idiot somewhere.

 

[1WildRT]

I just had the front of a 340 I built in the 90's apart a few weeks ago... Cloyes Tru-roller.. I was pleased to find it was still as tight as when I installed it...

 

[Workingdog1]

A pulley drives a belt. A sprocket drives a chain.

Clickbalit lol

 

[Desoto291hemi]

I have seen those several times myself,,, I always just steered clear of them .
Something just seems like it would be out of balance to me ,,,so I wasn’t going to be the Guinea pig and try it .
I purchased a nice one from SA gear,,,9 keyway crank gear,,,cam gear has holes machined around entire perimeter (10 holes I think ),,,,,and it has a real roller chain (ROLON ) ,that has 1/4 inch rollers (.250 ) .
It cost a little over a hundred bucks,,but its top quality and should last all the miles I want to put to it .

Tommy

 

[chorty55]

I decided on a timing job myself.

I had a cloyes installed back in the day on a v6 Dodge Dakota. Lasted about 4 months. So I put the original back on because I was in a tight time pinch on the side of the road, and luckily the old set was still in a bucket in the back.

Anyways

Today for this poor neglected 318s' 3rd timing and gear set, I think im going with the true roller set from edelbrock.

Not sure the history, but its not nylon can gear, so its at least it's 2nd set, and I've never seen it torn down in my life.

And here's today. There's like 5 more years on that chain set.